Alenor N-Flex synthetic rubber adhesive tape
ALENOR N-Flex is a self-adhesive tape made of foamed synthetic rubber with a reinforcing mesh and a permanent-tack adhesive. It seals the seams of rubber insulation and insulates hard-to-reach spots – valves, bends, tees and joints where a pipe section cannot be fitted. The tape is an insulating material itself, so no cold bridge forms at the joint.
The most common reason to use N-Flex is condensation on cold pipes: if the insulation seam is not sealed, moisture gets under the insulation, the pipe corrodes and the insulation loses its performance.
Technical data
- Material: foamed synthetic rubber with reinforcing mesh
- Density: 40–60 kg/m³
- Thermal conductivity (λ): ~0.031–0.037 W/(m·K)
- Adhesion to steel: ≥ 14 N/25 mm
- Service temperature: −40 °C to +80 °C
- Application temperature: +10 °C to +40 °C
- Thickness: 3 mm or 6 mm; roll length 15 m
- Use: indoors
Where to use it
- Rubber pipe insulation seams – longitudinal seams and butt joints, keeping the insulation continuous.
- Valves, bends, tees – places where a pipe section does not fit.
- Refrigeration and air-conditioning – cold pipes prone to condensation.
- Heating and hot-water pipes – up to +80 °C.
- Ventilation – insulating joints and damping vibration.
How to apply
- The pipe and insulation must be clean, dry and degreased. Install when the system is off and the pipe is not cold or wet.
- Cut the required length and remove the release paper gradually.
- Wrap with a small overlap without stretching, so the foam keeps its thickness.
- Press firmly along the whole length, especially at seam ends.
Application temperature starts at +10 °C – in a cold room, warm up the tape and the surface first.
Frequently asked questions
Which thickness should I choose?
The thinner 3 mm tape is more flexible and handier for sealing seams; the 6 mm tape forms a thicker insulating layer, e.g. on valves and bends.
Is N-Flex suitable for hot pipes?
Yes, up to +80 °C. For hotter surfaces, choose the heat-resistant aluminium foil tape.
What should I use on foil-faced insulation?
Use the reinforced aluminium tape for foil insulation seams.
Read more: condensation on cold pipes – how N-Flex prevents it and the mounting tapes guide. More tapes in the mounting tapes category.
Delivery and wholesale
We deliver to DPD, Omniva and Venipak parcel lockers across Latvia in 2–3 working days and to Lithuania and Estonia in 2–5 working days (delivery terms). Construction companies and resellers get wholesale prices – email [email protected] or call +371 28348301.
